Android 蓝牙自动连接实现

Android连接蓝牙设备一般有这几个步奏

1、注册蓝牙相关的广播

IntentFilter intent = new IntentFilter();
intent.addAction(BluetoothDevice.ACTION_FOUND);// 用BroadcastReceiver来取得搜索结果
intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(searchDevices, intent);

2、搜索蓝牙设备

BluetoothAdapter.getDefaultAdapter().startDiscovery();

3、配对

btDev.createBond();

4、建立连接

private void connect(BluetoothDevice btDev) {
UUID uuid = UUID.fromString(SPP_UUID);
try {
// btSocket = btDev.createRfcommSocketToServiceRecord(uuid);
btSocket =(BluetoothSocket) btDev.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(btDev,1);

Log.d("BlueToothTestActivity", "开始连接...");
btSocket.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
Log.e("BlueToothTestActivity", "开始连接......链接失败");
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

此处不抛出异常即可连接成功

完整代码：

package com.example.bluetoothtest;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.ToggleButton;
/**
* @author Ken
* @date 2016年4月20日 下午3:33:35
*/
public class BlueToothTestActivity extends Activity {
//该UUID表示串口服务
static final String SPP_UUID = "00000000-0000-1000-8000-00805F9B34FB";
Button btnSearch, btnDis, btnExit,spilt;
ToggleButton tbtnSwitch;
ListView lvBTDevices;
ArrayAdapter<String> adtDevices;
List<String> lstDevices = new ArrayList<String>();
BluetoothAdapter btAdapt;
public static BluetoothSocket btSocket;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//        if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
//            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
//            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
//        }
setContentView(R.layout.activity_main);
// Button 设置
btnSearch = (Button) this.findViewById(R.id.btnSearch);
btnSearch.setOnClickListener(new ClickEvent());
btnExit = (Button) this.findViewById(R.id.btnExit);
btnExit.setOnClickListener(new ClickEvent());
btnDis = (Button) this.findViewById(R.id.btnDis);
btnDis.setOnClickListener(new ClickEvent());
//        // ToogleButton设置
tbtnSwitch = (ToggleButton) this.findViewById(R.id.tbtnSwitch);
tbtnSwitch.setOnClickListener(new ClickEvent());

spilt = (Button)this.findViewById(R.id.spilt);
spilt.setOnClickListener(new ClickEvent());

//        // ListView及其数据源 适配器
lvBTDevices = (ListView) this.findViewById(R.id.lvDevices);
adtDevices = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, lstDevices);
lvBTDevices.setAdapter(adtDevices);
lvBTDevices.setOnItemClickListener(new ItemClickEvent());

btAdapt = BluetoothAdapter.getDefaultAdapter();// 初始化本机蓝牙功能
if (btAdapt.isEnabled()) {
tbtnSwitch.setChecked(false);
} else {
tbtnSwitch.setChecked(true);
}
// ============================================================
// 注册Receiver来获取蓝牙设备相关的结果
IntentFilter intent = new IntentFilter();
intent.addAction(BluetoothDevice.ACTION_FOUND);// 用BroadcastReceiver来取得搜索结果
intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
intent.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(searchDevices, intent);
}

private BroadcastReceiver searchDevices = new BroadcastReceiver() {

public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Bundle b = intent.getExtras();
Object[] lstName = b.keySet().toArray();

// 显示所有收到的消息及其细节
for (int i = 0; i < lstName.length; i++) {
String keyName = lstName[i].toString();
Log.e(keyName, String.valueOf(b.get(keyName)));
}
BluetoothDevice device = null;
// 搜索设备时，取得设备的MAC地址
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() == BluetoothDevice.BOND_NONE) {
String str = "未配对|" + device.getName() + "|"
+ device.getAddress();
if (lstDevices.indexOf(str) == -1)// 防止重复添加
lstDevices.add(str); // 获取设备名称和mac地址
adtDevices.notifyDataSetChanged();
}
}else if(BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)){
device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
switch (device.getBondState()) {
case BluetoothDevice.BOND_BONDING:
Log.d("BlueToothTestActivity", "正在配对......");
break;
case BluetoothDevice.BOND_BONDED:
Log.d("BlueToothTestActivity", "完成配对");
connect(device);//连接设备
break;
case BluetoothDevice.BOND_NONE:
Log.d("BlueToothTestActivity", "取消配对");
default:
break;
}
}

}
};

@Override
protected void onDestroy() {
this.unregisterReceiver(searchDevices);
super.onDestroy();
android.os.Process.killProcess(android.os.Process.myPid());
}

class ItemClickEvent implements AdapterView.OnItemClickListener {

@SuppressLint("NewApi") @Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
if(btAdapt.isDiscovering())btAdapt.cancelDiscovery();
String str = lstDevices.get(arg2);
String[] values = str.split("\\|");
String address = values[2];
Log.e("BlueToothTestActivity", "address :"+values[2]);
BluetoothDevice btDev = btAdapt.getRemoteDevice(address);
try {
Boolean returnValue = false;
if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {
btDev.createBond();
}else if(btDev.getBondState() == BluetoothDevice.BOND_BONDED){
connect(btDev);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

private void connect(BluetoothDevice btDev) {
UUID uuid = UUID.fromString(SPP_UUID);
try {
// btSocket = btDev.createRfcommSocketToServiceRecord(uuid);
btSocket =(BluetoothSocket) btDev.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(btDev,1);

Log.d("BlueToothTestActivity", "开始连接...");
btSocket.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
Log.e("BlueToothTestActivity", "开始连接......链接失败");
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

class ClickEvent implements View.OnClickListener {
@Override
public void onClick(View v) {
if (v == btnSearch)// 搜索蓝牙设备，在BroadcastReceiver显示结果
{
if (btAdapt.getState() == BluetoothAdapter.STATE_OFF) {// 如果蓝牙还没开启
Toast.makeText(BlueToothTestActivity.this, "请先打开蓝牙", 1000)
.show();
return;
}
if (btAdapt.isDiscovering())
btAdapt.cancelDiscovery();
lstDevices.clear();
Object[] lstDevice = btAdapt.getBondedDevices().toArray();
for (int i = 0; i < lstDevice.length; i++) {
BluetoothDevice device = (BluetoothDevice) lstDevice[i];
String str = "已配对|" + device.getName() + "|"
+ device.getAddress();
lstDevices.add(str); // 获取设备名称和mac地址
adtDevices.notifyDataSetChanged();
}
setTitle("本机蓝牙地址：" + btAdapt.getAddress());
btAdapt.startDiscovery();
} else if (v == tbtnSwitch) {// 本机蓝牙启动/关闭
if (tbtnSwitch.isChecked() == false)
btAdapt.enable();

else if (tbtnSwitch.isChecked() == true)
btAdapt.disable();
} else if (v == btnDis)// 本机可以被搜索
{
Intent discoverableIntent = new Intent(
BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(
BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);
} else if (v == btnExit) {
try {
if (btSocket != null)
btSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
BlueToothTestActivity.this.finish();
}
}
}
private void autoConnect(String address){
if(btAdapt.isDiscovering())btAdapt.cancelDiscovery();
BluetoothDevice btDev = btAdapt.getRemoteDevice(address);
try {
if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {
btDev.createBond();
}else if(btDev.getBondState() == BluetoothDevice.BOND_BONDED){
connect(btDev);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

自动连接就只需要调用autoConnect(String address),具体的address就在BluetoothDevice.ACTION_FOUND广播中获取的。